Thanks for the replies so far. I'm 5 foot 7.5, and on my pace I had a stem about 70 mm long, fair bit of rise, and riser bars. They can be changed if needed on a new frame. My pace felt really good on the back wheel, but it was an effort pulling it back up onto the balance point for manuals and stuff. I'm not sure I could do it with a much longer frame. I really need to measure the wheelbase I guess.
I've cracked 2 aluminium frames in about a month (one trials) so steel seemed like a good idea, but I don't want to struggle on the back wheel, or on the other hand, struggle to bunnyhop and manual on something too long.
Thanks Rich, I'll get in touch with him.
I will look into the frames people suggested, I want something pretty nice.
Many thanks, Mat